全文获取类型
收费全文 | 394189篇 |
免费 | 25990篇 |
国内免费 | 8452篇 |
专业分类
耳鼻咽喉 | 4337篇 |
儿科学 | 10227篇 |
妇产科学 | 7314篇 |
基础医学 | 29451篇 |
口腔科学 | 8830篇 |
临床医学 | 47581篇 |
内科学 | 47032篇 |
皮肤病学 | 4867篇 |
神经病学 | 20635篇 |
特种医学 | 8700篇 |
外国民族医学 | 33篇 |
外科学 | 41345篇 |
综合类 | 60533篇 |
现状与发展 | 16篇 |
一般理论 | 35篇 |
预防医学 | 47157篇 |
眼科学 | 5754篇 |
药学 | 34948篇 |
555篇 | |
中国医学 | 34713篇 |
肿瘤学 | 14568篇 |
出版年
2024年 | 1286篇 |
2023年 | 6551篇 |
2022年 | 11722篇 |
2021年 | 15903篇 |
2020年 | 15327篇 |
2019年 | 20183篇 |
2018年 | 17690篇 |
2017年 | 14744篇 |
2016年 | 12267篇 |
2015年 | 11488篇 |
2014年 | 24231篇 |
2013年 | 25263篇 |
2012年 | 21827篇 |
2011年 | 23868篇 |
2010年 | 19587篇 |
2009年 | 17272篇 |
2008年 | 16732篇 |
2007年 | 17020篇 |
2006年 | 15053篇 |
2005年 | 12796篇 |
2004年 | 10385篇 |
2003年 | 9026篇 |
2002年 | 7020篇 |
2001年 | 6183篇 |
2000年 | 5098篇 |
1999年 | 4395篇 |
1998年 | 3592篇 |
1997年 | 3375篇 |
1996年 | 2904篇 |
1995年 | 2754篇 |
1994年 | 2651篇 |
1993年 | 2121篇 |
1992年 | 2126篇 |
1991年 | 1843篇 |
1990年 | 1631篇 |
1989年 | 1441篇 |
1988年 | 1364篇 |
1985年 | 3876篇 |
1984年 | 4878篇 |
1983年 | 3408篇 |
1982年 | 3882篇 |
1981年 | 3626篇 |
1980年 | 3225篇 |
1979年 | 2954篇 |
1978年 | 2588篇 |
1977年 | 1947篇 |
1976年 | 2189篇 |
1975年 | 1654篇 |
1974年 | 1450篇 |
1973年 | 1292篇 |
排序方式: 共有10000条查询结果,搜索用时 9 毫秒
21.
王磊 《中华老年口腔医学杂志》2006,4(1):41-42
目的:通过对近两年社区卫生服务中心327例老年病人拔牙临床观察,探讨基层社区老年病人的特点。方法:通过心理、精神和技术方面的配合,安全顺利地完成拔牙术。结果:除5例病人术后感头晕外,其余均顺利完成且病人满意。结论:社区卫生服务中心除具备熟练的技术外,医患之间心理沟通是必不可少的。 相似文献
22.
肝癌间质及癌旁病变的病理分析 总被引:2,自引:0,他引:2
目的 研究肝癌间质及癌旁病变的临床病理意义。方法 在 2 0例肝癌组织标本中取 45个癌结节 ,分别在癌结节中间、癌旁肝组织等部位取组织 4块 ,连续切片 ,显微镜下观察。结果 19个结节有完整窦内皮细胞围绕癌巢 ,其中癌结节肉眼小于3cm者 13个 ,大于 3cm者 6个。 2 6个癌结节无完整窦内皮细胞围绕癌巢 ,其中癌结节直径大于 3cm者 2 4个 ,小于 3cm者 2个。2 0例中有 13例合并肝硬化 ,17例有乙型肝炎病毒感染和HBsAg阳性。 结论 病理连续切片 ,显微镜下观察肝癌间质及癌旁病变是预测肝癌患者预后的重要病理学指标 相似文献
23.
Intraductal papillary mucinous tumor (IPMT) of the pancreas is characterized by slow growth and a relatively favorable prognosis, however, invasive cancer originating in an IPMT is associated with a poor prognosis. Although various parameters in imaging modalities have been advocated to differentiate between benign IPMN and malignant ones, it is not easy to obtain definite diagnosis based on these parameters. Peroral pancreatoscopy (POPS) allows a clear and direct visualization of the pancreatic duct, providing useful information regarding tumor nature in IPMT. The authors have studied the usefulness of POPS in the diagnosis of IPMT. Nevertheless, its usefulness is not necessarily widely accepted and the significance of POPS is still controversial. In this review, the authors intended to address the diagnostic value of POPS and to clarify its role in the diagnosis of IPMT. The authors think treatment of IPMT can be improved by introducing POPS because the determination of surgical procedure as well as the area of resection based on the preoperative diagnosis of the involvement of the main pancreatic duct and branch duct is inevitable. 相似文献
24.
N Simelela 《International journal of gynaecology and obstetrics》2006,94(3):292-300
Preventing unintended pregnancies through access to modern family planning could avert 20-35% of maternal deaths, saving the lives of more than 100,000 women each year. Obstacles to wider access still exist, but they may be overcome by overt policy commitment to reproductive health services, partnership between stakeholders, community involvement and quality programs. 相似文献
25.
目的治疗顽固性下颌磨牙根尖周炎。并尽量减少对牙周膜的机械性损伤。方法采用下牙槽神经阻滞麻醉,并配合局部麻醉。拔牙钳的尖置放于釉牙骨质界以上,采用颊舌向摆动的方式将患牙拔下。在不断滴有生理盐水的条件下,立即用高速车针磨除患牙根尖2 ̄3mm的牙体组织,根管内3 ̄5mm深的充填物要用圆钻将其清除,再用牙胶尖和氢氧化钙糊剂充填。将患牙再植入牙槽窝之前,务必用生理盐水将牙槽窝冲洗干净,要求严格控制在15分钟内完成再植,并尽量减少对牙周膜的机械性损伤。再植牙齿一般不需要夹板固定,必要时可采用缝线缝合固定。结果我们选择的5例患者,术后随访1 ̄2年,1例患者再植失败,4例患者再植成功。结论特异性再植术治疗顽固性下颌磨牙根尖周炎疗效理想,而且较易掌握。 相似文献
26.
James R. Westphal 《International journal of mental health and addiction》2007,5(2):123-140
Introduction Recent reviews found problem gamblers are heterogeneous and recommended subtyping gamblers in treatment studies.
Objective Review factors (stage of change, preferred gambling activity, co-occurring disorder, and temporal instability of symptoms)
for subtyping by evaluating the evidence for their effects on gambling treatment.
Methods Literature review, evidence grading.
Results Evidence is limited that any of the reviewed factors affects gambling treatment. Substantial evidence from prospective studies
and other evidence from cross-sectional studies and the strong placebo response among pathological gamblers support the temporal
instability of gambling symptoms.
Conclusions Multiple studies are needed to develop the evidence base needed to subtype gamblers in treatment. Changes in the diagnostic
criteria of pathological gambling may be necessary, especially to specify the persistence of gambling-related symptoms. 相似文献
27.
Michiel R. de Boer Jos Twisk Annette C. Moll Hennie J. M. Völker-Dieben Henrica C. W. de Vet Ger H. M. B. van Rens 《Ophthalmic & physiological optics》2006,26(6):535-544
Consecutive patients (n = 215) who were referred to optometric (55%) or multidisciplinary (45%) low-vision services and above 50 years of age were recruited from four hospitals in the Netherlands. They completed two vision-related quality of life questionnaires, the Vision Quality of Life Core Measure (VCM1) and the Low Vision Quality of Life Questionnaire (LVQOL), before their first visit with low-vision services and 1 year later. At follow-up, patients referred to multidisciplinary low-vision services had lower scores on the mobility subscale of the LVQOL than patients referred to optometric low-vision services [5.3 points; 95% confidence interval (CI): 0.2-10.5]. Paired sample t-tests for the two groups of patients taken together show improvement for the VCM1 (3.1 points; 95% CI: 0.6-5.6) and deterioration for the basic aspects of vision (3.5 points; 95% CI: 1.1-5.9) and the mobility (6.6 points; 95% CI: 3.7-9.5) subscales of the LVQOL. In conclusion, people referred to optometric services showed less deterioration in mobility than those referred to multidisciplinary services. No differences were observed for any of the other subscales of the LVQOL and the VCM1. Future research in this field should include randomized controlled designs comparing low-vision services with no treatment or placebo. 相似文献
28.
29.
粉防己碱对野百合碱致大鼠肺动脉构形重建的逆转作用 总被引:2,自引:0,他引:2
以野百合碱复制Wistar大鼠肺动脉高压模型,用特殊染色方法观察粉防已碱对野百合碱致大鼠肺动脉构形重建的逆转作用,结果表明粉防已碱可选择性的降低野百合碱诱导的大鼠肺动脉高压的作用,并明显地逆转肺血管及肺组织损伤,降低肺动脉高压和右心室肥大,对体循环压力无影响 相似文献
30.